/*
 * Copyright 2011 Michele Mancioppi [michele.mancioppi@gmail.com]
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cave.nice.testMessage.ui.tags;

import java.io.IOException;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.tagext.SimpleTagSupport;

import com.google.appengine.api.users.User;
import com.google.appengine.api.users.UserService;
import com.google.appengine.api.users.UserServiceFactory;

public class UserEmailTag extends SimpleTagSupport {

	@Override
	public void doTag() throws JspException, IOException {
		UserService userService = UserServiceFactory.getUserService();
		User user = userService.getCurrentUser();

		if (user == null) {
			throw new JspException("User not logged in to a Google Account");
		}

		getJspContext().getOut().print(user.getNickname());
	}

}
